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How to Choose the Right Tools for Cutting Metal

One way or another, you’re going to have to cut that metal to size. Here are the many different ways to do that—each with their own pluses and minuses.

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Low-Buck Tech Tips From the Clever Readers of Grassroots Motorsports

Our readers are an endless source of clever solutions to automotive problems great and small. Their low-buck fixes and fabrications would make MacGyver proud.

Repair that cracked front spoiler in seven easy steps

A bruised chin spoiler can spoil a car’s entire look. Ditch the duct tape and perform a proper repair with just a few hours’ work.

GRM+
18 Dyno Time Tips That Make Each Dollar Count

You can add heaps of trick performance modifications to your car, but without quantitative data there’s no way to know if you’re working toward your goal or simply burning money.

How the Right Fastener Can Prevent Hardware Failure on Track

Learn from our mistakes: Here are a few different types of locking nuts, washers, and threads specially designed to keep hardware tight, and how each type works.

How to Easily and Accurately Drill Holes Using a Divider Tool

A custom bracket with mis-drilled holes is pretty much worthless. Here’s how we used a divider to quickly locate three holes in a custom bracket.

Is a Water/Methanol Injection Kit the Tuning Aid You Need?

The premise behind water injection is simple: Squirt a mixture of water and methanol–windshield washer fluid, basically–into the engine’s combustion chamber to cool the intake charge and prevent detonation.

An engineer weighs in on Corvette leaf springs: Deep talk on a seemingly simple subject.

A straightforward question came up as we worked on our Corvette Z06 project car: What are the rates for leaf springs–both OEM and some popular replacements?

How To Optimize an ND-Chassis Mazda MX-5 for Comfort on the Street and Performance on the Track

Can one car make a great daily while also serving as a competitive autocrosser and a fun track car? If the answer is Miata, then likely yes.

How to remove a stuck crank pulley with a DIY strap wrench

Need to change a timing belt, but the crank pulley won't budge? Here's how to get it unstuck.

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